Six-wheel truck for railway-cars.



J. A. PILCHER.

SIX WHEEL TRUCK FOR RAILWAY CARS.

APPLICATlON FILED FEB. 2|, 19H.

Pat'e ntedAug. 24, 1915.

witwzaoeo snares PATENT oFFIQ JOHN A. PILCHER, OF ROANOKE, VIRGINIA.

SIX-WHEEL TRUCK FOR -EAILWAY-CARS.

1!?) all )(71 om it may concern Be it known that I, JOHN A. PILCHER, a citizen of the United States, residing at Roanoke, in the county of Roanoke and State of Virginia, have invented certain new and useful Improvements in SiX-VVheel Trucks for Railway-Cars, of which the following a specification.

The object of this invention is to provide an improved form of bolster construction for six wheel trucks for railway cars, with which object in view it consists in the arrangement of the various parts as will be herein described and finally claimed.

' Specification of Letters Patent.

In the drawings, Figure 1 is a plan View of the truck of my invention, Fig. 2 is a part side elevation and part sectional elevation taken onthe line A B, Fig. 1, and Fig.

3 is a transverse sectional view taken on the.

line C D, Fig. 1.

- Referring to the drawings in "which like parts are given the same reference numbers wherever they occur, 1 represents an outer axle, the middle axle and 3 the other outer axle. To these axles are secured in the custoi'nary manner the wheels 4: and the ends of the axles are ournaled in journal boxes 5.

in the drawings the journal boxes for the axles 1 and 2 are shown rigidly SGClll'QdJtO side frames (5 while the journal boxes for the axle 3 a re rigidly secured to the outer ends of side frames 7. The inner ends of the side frames 7 are shown as passing over the journal boxes for the middle axle hand the inner ends of said frames are shown as resting in pockets in the side frames 6. The frames 7 are therefore articulated with reference to the side frames 6 which may be termed rigid side frames: This allows independent vertical movement of the various truck wheels to follow irregularities of the track, and at the same time the construction described provides a simple means for equah izing the load among the three axles. "But these side frames might be of any suitable design, the journal boxes being either ri id or of the pedestal type. The side frame construction, however, should be provided with openings or guides to receive the outer ends 9 of two transverse bolsters 10, wh1ch are supported by suitable springs 11.

member of the side frame as shown in the drawings, or on a suitable arrangement of 'ng bars or other means for transthe load to the journal boxes.

The springs 11 may rest on either the bottom Patented Aug. 214, i915.

Applieation'filed February 21, 1914. Serial No. 820,223.

The load of the car body is carried on the center plate 12 which is either integral With or secured to a center bolster 13. This cen ter bolster is formed in plan view in the shape of a letter H, the center plate 12 being located on the transverse or central member 14 of the H, and the parallel legs 15 and 16 of the H being disposed longitudinally of the truck, inside of the wheels and side frame construction. By constructing the center bolster in shape the two parallel members may be made of greater depth than if a single member were "used immediately under the truck center plate.

The transverse member 14: of the center bolster 13 is formed in cross section preferably in the general form of an inverted U, the legs of the U extending down along either side of the middle axle, as at 17, to secure the necessary depth of section.

In side elevation the parallel members 15 and 16 of the center bolster 13 are humped up over the middle axle at 18 and are then dropped down and the ends 19 are carried in suitable openings 20 in the transverse transoms 10. l

Between the ends 19 of the center bolster 13 and the hoisted-'10 are placed rollers 21 which are adapted to allow a slight lateral movement of the center bolster 13 and the car body on it with respect to the side frames, with a greater or less amount of resistance, depending on the contour of the path of the rollers. I

The transverse bolsters 10 being yieldably supported by the springs 11, and the center bolster 13 being merely supported by and not rigidly or integrally secured to these transverse bolsters, the bolster or load-supporting arrangement as a Whole forms a somewhat yielding and accommodating structure so that it is not so important that the four groups of springs be in a perfect plane as is the case when the center bolster and transverse bolsters-are made integral with each other.

At the top of the hump 18 of the centerbolster 13 is located a pocket 22 to accommomight, if desired, be carried out (over the middle wheels.

distance as By this eonstruetion the side hearings thel'nselves may he located inside of or over the middle wheels. the side hearings on the car body, of course, heing loeated to agree with those on the trneli.

The eross section of the parallel inen'ihers 15 and lo ol the eenter holster 13 may he of any shape but is shown in the drawings and, is preferably made of I shape.

It will of course, he understood that vari ous changes of details might he made in the general construction without departing from the spirit of my invention.

Having thus deserihed my invention, what 1 claim is,

In a six wheel true]; jlor railway (bars, a center holster of substantially llshape .in

plan view having the members comprising the parallel sides ol the H disposed inside of and parallel with the truek wheels and having the transverse inenilier of the H disposed transversely ol the truek and over the middle axle. transverse holster having openings adapted to reeeive the ends ol the par'allel memhers of the (enter holster. and means for vieldahl v supporting the ends of the said transverse holsters.

In testimony whereol' l allix my signature in preseuee o'l two witnesses.

JOHN A. llll lllill.

YltlltSHtSI Rev K. lhzown,

\Y. B. hicnn. 

